Springless lock.



P. J. o'BR1BN.`

SPRINGLBSS LOOK.

. APPLIOATION FILED APR.B7. 1909.

Patented Feb.. 1, 1910.

WIT/'158858:

qren.

SPRINGLESS LOCK.

Specification of Letters Patent.

Patented Feb. 1, 1910.

Application filed April 27, 1909. Serial No. 492,604.

To all whom it may concern:

Be it known that I, PATRICK J. UBRIEN, residing at Torris Cove,Newfoundland, have invented a new and Improved Construction ofSpringless Ilock, of which the following is a specification.

rIhis invention relates to improvements in that type of door locks inwhich the locking bolt is weighted to swing by gravity into its lockingposition and in which the usual bolt or latch returning spring devicesare omitted and it has for its object to provide a new and improved lockof the type stated of a simple and economical construction, in which thebolt is especially designed for being mounted within the lock casing towork for a right or left hand closing door and in which a special typeof key controlled detent is included that maintains its adjustedpositions relatively to the locking bolt until moved to or from the boltlocking position by turning the key.

With other objects in view that will hereafter appear my inventionconsists in the peculiar arrangement and combination of partshereinafter fully explained, specifically pointed outy in the appendedclaims and illustrated in the accompanying drawings, in which:

Figure l, is a perspective view of the preferred form of my improvedlock, the casing plate being omitted and the bolt shown in its normal orinterlocked position. Fig. 2, is a full view of the lock, the casingplate omitted., and the bolt shown as held locked to its latchedposition. Fig. 3, shows the bolt, the key actuated detent and the knotcontrolled dog or tumbler that constituto the internal mechanism of mylock, detached. Fig. 4, is a face view of a modified form of latch boltcombined with the detent and dog devices of the preferred form of mylock. Fig. 5, is a similar view of a further modification of my lockthat will be hereinafter described. Fig. 6, is a detail section on theline 6-6 of Fig. 2.

In the drawings, l designates the lock casing of the conventional type,it having the usual screw receiving bosses 10, to receive the screws forholding the cover plate not shown. The casing shown, is of the mortiselock kind and has the usual latch bolt opening 1l in the front face, theknob spindle aperture 12 and the keyway 13.

peculiar construction of which forms the j essentials of my invention,comprises three parts, the locking bolt 2, the key controlled detent 3and the knob controlled dog 4. In the preferred construction, the bolt 2has the shape of the letter Z, its oppositely projected ends 20-20terminating in thickened heads 21-21 that are beveled as at 2222, andthey form the usual type of beveled latch members for sliding into alocked engagement with the lock mortise in the door casing when the dooris closed at the angle ends .2S-23. lIhe bolt 2 is apertured as at231-23EL and through either of these apertures passes the pivot stud orscrew 5 that engages the lock casing at such point, relatively to thelatch opening l1, that the said latch 2 when hung by the screw 5gravitates so its lower head 2l swings through the opening l1, asclearly shown in Figs. l and 2 of the drawings, by reference to which itwill be also noticed that the upper latch head 21 projects inwardly andforms an angle extension or member for cooperating with the knob spindledog 4, which, in the form shown in Figs. l and 2, extends under the saidangle member or head 2l, and is held from turning downwardly on a reststud 6 which may also be formed with a socket for receiving one of thecasing plate holding screws.

By reason of the arrangement of the two parts 2 and 3, as shown anddescribed, it is obvious that by simply turning the knob in thedirection of the arrow cl on Fig. 2, the dog will lift the angle memberor head 2l, and thereby swing the latch inwardly to move its lockinghead out of the door casing inortise, it being obvious that so soon asthe knob is released the weight of the latch will cause the knob to turnback to its normal position (see Fig. 2) and the locking head 22 t0gravitate through the front wall ofthe casing to a locking position.

` By making the locking latch 2 in the manner shown and described, itwill be readily apparent it can be adjusted to hang from either of itsapertured ends, for a right or left hand closing door, the lower headalways forming the latch head while the upper head forms the anglemember for engaging the knob dog 3.

While I prefer the form of latch member shown in Figs. lv and 2, thevsame results can be obtained by shaping the latch member 2 as shown inFig. 4, which shows the same T- shaped, with the latch heads 21a- 21aformed in the opposite ends of the cross member 2a, the latter having arecess 2b midway the heads 21a-21a, the purpose of which will presentlyappear, it being understood that the said heads are reversely beveled topermit of interchangeably hanging the said T- shaped member on the stud5, the upper or neck end having a pair of apertures 2C-2c foralternately engaging the stud and the said` neck end has angle members21--2d for cooperating' with the knob dog 3.

In Fig. 5 is shown a further modification of the latch bolt and in thisform it has a Asusbtantially U-shape, its ends 21"*21x forming thelockingy or latch heads, either of which can be hung to swing throughthe casing bolt slot by hanging the said latch boltv on the stud 5 witheither of its apertures 21Y.-21y engaging said stud 5. In this form theknob dog or tumbler 3 has a heel 80 that projects from the hub 3l in adirection opposite to the lifting end, which in the form shown in F ig'.5, projects rearward-ly so that when the knob spindle is turned in thedirection of arrow s the bolt is swung to the position shown in dottedlines on Fig. 5, and the heel. is brought to the position shown toloe-engaged by the-detent inthe manner presently explained.

The key controlled detent 4, before referred to, so far as it relates tothe form of latch bolts shown in Figs. 1, 2 and 4, is of the.V shapeshown in Figs. 2 and 4 and consists of a melnber that is pivotallymounted on the screw stud 9 adjacent the key hole, and at the key holeend the said member is bifurcated or Y-shaped to straddle the rodof'theikey K, in such manner that the turning of the key in thedirection of the arrow le moves the detent to the locking position shownin Fig. 2, and when moved in the opposite direction, see arrow 7c', itmoves the detent 4, to the latch bolt released position, as clearlyshown in Fig. 4. To hold the detent 4to its shifted position a flatspring plate 502is secured on the under side of the letent` tofrictionally engage the casing, see

Detent 4, in the form shown in Figs. 1, 2 and; 4, has a heel 40 forengaging either of the recesses in the latch bolt in such manner thatwhen the said heel is moved up to the locked positionk the latch bolt ispositively held from movement and by reason of the way it, at its anglemembers, engages the knob dog or tumbler the knob and spindle is alsolocked 'fromY turning. In Fig. 5, the detent 4 is of a slightlydifferent shape, it, however, having the Y-shapedface for coacting withthe key wad, but in addition to the heel.- 40, for engaging onel end of:the

latch member, see dotted lines in Fig. 5, it has another heel member 4lfor projecting over the heel on the knob spindle tumbler for holding theseveral parts locked from movement.

From the foregoing taken in connection with the accompanying drawing,the complete construction` the manner in which my lock is used and theadvantages of its structure is believed to be clearly shown and readilyunderstood, the same is of a very few parts and they are so shaped thatthey can be economically manufactured and easily assembled for either aright or left hand closing door.

I am aware that it is not new to provide springless locks in which thelatch bolt gravitates to its latching position. My invention, so far asI know, differentiates from what has heretofore been done in this art,in the peculiar correlation, the combination and shaping of the severalparts whereby no interchanging or adjusting of the several parts isrequired further than to hang the double headed lock bolt to theposition necessary toadapt it for the particular kind of door on whichit is to be used.

lVliat I claim is:

l. In a` springless lock, the combination with the casing, the knob dogor tumbler, and a fulcrum stud in the casing; of a double headed lockingbolt, the heads having oppositely beveled latch faces, said bolt havingtwo apertures adapted for being alternately hung on the stud, said bolthavingi a pair of oppositely projected angle portions, either of whichcooperates with the knob tumbler, a key controlled detent adapted to bekey shifted into and out of a locked engagement with the pivotally hungbolt when the latter is at its door locking position, and means on thedetent for holding it in a tight frietional contact with the casing.

2. The combination with the casing, the knob actuated tumbler and asingle bolt hanging stud, of a double headed bolt, havingy twoapertures, either adapted for receiving the stud for hanging the boltfor a right or left closing door, the heads of the bolt havingoppositely beveled latch faces, said bolt having a pair of oppositelyprojected angle members for coacting with the knob tumbler, said bolthaving locking shoulders contiguous to the opposite latch heads, and akey actuated detent fulcrumed on the casing having a forked end forcoacting with the key wad and having a heel for engaging the lockinglshoulders in the bolt heads.

3. The combination with the casing, the knob actuated tumbler and asingle bolt hanging stud, of a double headed bolt, having two apertures,either adapted for receiving the stud for hanging the bolt for a rightor left closing door, the heads.l ofi the bolt having a pair ofoppositely projected angle locking shoulders in the bolt heads, andmembers for coactmg with the knob tumhaving means for frictionailyholding it to bler, said bolt having locking shoulders conits keyshifted positions.

tiguous to the Opposite latch heads, a key PATRICK J. OBRIEN. n actuateddatent fulcrumed on the casing Witnesses:

having a forked end for coacting With the JOI-IN BARRON,

key Wad and having a heel for engaging the FRANK J. BARRoN.

